They're protected here in Iowa since back in the 80's. Any deer over 50% white we can't shoot.
In Seneca NY, there is a whitetail deer herd that was basically "quarantined" to the Seneca Army Depot. They are not albino, just leucistic, lacking any pigment in their coats. About 50% of the 700 deer in the herd are white. While the Depot has been closed for many years, the fence is still up.